Liam is the Irish short form of Uilliam, the Irish equivalent of William, and it has long been used as a name in its own right in Ireland. William comes from the Germanic Willahelm, usually analyzed as “will” plus “helmet” and rendered as “resolute protector” or “helmet of will.” Standard name dictionaries agree on this derivation, though the exact shade of meaning in the compound varies slightly from one source to another.
The name is pronounced LEE-uhm in both American and British English, with the stress on the first syllable.
Its best-known bearers are the Northern Irish actor Liam Neeson and the English singer Liam Payne, who came to prominence as a member of One Direction.
In the United States, Liam has been the most popular name for boys since 2017 and still held first place in 2025, when 20,818 boys received it. The rise was quick: the name first entered the top 100 in 2006 and reached the top ten in 2012, at number six. Its largest yearly count so far came in 2024, with 22,252 babies.
| Liam Neeson - William John Neeson is a highly acclaimed Northern Irish actor, recognized with numerous award nominations and ranked seventh on The Irish Times' list of Ireland's 50 Greatest Film Actors, who was also appointed Officer of the Order of the British Empire in 2000. |
| Liam Payne is an English singer and songwriter who rose to fame on The X Factor and as a member of One Direction. |
| Liam Hemsworth is an Australian actor known for Neighbours and The Elephant Princess, and for starring in The Last Song, The Hunger Games, and Independence Day Resurgence. |
| Born in England, former defensive midfielder Liam Bridcutt represented Scotland and is a coach at National League club Gateshead. |
| Liam O'Brien - English goalkeeper Liam O’Brien plays for Bedworth United, having started at Portsmouth and earned one England U19 cap. |
| Liam Marc Henderson is an English semi-pro striker for Ashington in the Northern Premier League Division One East. |
| Liam Rosenior is an English football manager and former player who coaches Ligue 1 club Strasbourg. |
| Liam Brian Williams is a Welsh rugby union player for Newcastle Red Bulls who debuted for Wales in 2012, represented the British and Irish Lions in 2017 and 2021, and previously played for Scarlets, Cardiff and Kubota Spears. |
| Liam Boyce is a Northern Irish forward for Derry City and the Northern Ireland national team. |
| Liam Jones is a former AFL footballer for the Western Bulldogs and Carlton. |
| Liam Foudy is a Canadian ice hockey centre for the AHL Bridgeport Islanders under contract with the New York Islanders, drafted 18th overall by the Columbus Blue Jackets in 2018. |
| Liam Ryan is a small forward for the West Coast Eagles in the AFL, renowned for his vertical leap and spectacular high marks. |
| Liam Messam is a retired New Zealand rugby union star, a versatile loose forward who played for Waikato and the Chiefs, later joined Toulon, and co-captained the Chiefs from 2012. |
| Liam Dolan is a senior group leader at the Gregor Mendel Institute of the Austrian Academy of Sciences, previously Sherardian Professor of Botany at the University of Oxford and a Fellow of Magdalen College from 2009 to 2021. |